<template>
  <a-modal
    :title="model && model.id > 0 ? '编辑': '新增'"
    :width="640"
    :visible="visible"
    :confirmLoading="loading"
    @ok="() => { $emit('ok') }"
    @cancel="() => { $emit('cancel') }"
  >
    <a-spin :spinning="loading">
      <a-form :form="form" v-bind="formLayout">
        <a-form-item label="初始余额">
          <a-input-number v-decorator="['price']" style="width: 100%" name="name"/>
        </a-form-item>
      </a-form>
    </a-spin>
  </a-modal>
</template>
    
    <script>
    import pick from 'lodash.pick'
    // 表单字段
    const fields = ['description', 'id']
    
    export default {
      props: {
        visible: {
          type: Boolean,
          required: true
        },
        loading: {
          type: Boolean,
          default: () => false
        },
        model: {
          type: Object,
          default: () => null
        }
      },
      data () {
        this.formLayout = {
          labelCol: {
            xs: { span: 24 },
            sm: { span: 7 }
          },
          wrapperCol: {
            xs: { span: 24 },
            sm: { span: 13 }
          }
        }
        return {
          form: this.$form.createForm(this)
        }
      },
      created () {
        // 防止表单未注册
        fields.forEach(v => this.form.getFieldDecorator(v))
    
        // 当 model 发生改变时，为表单设置值
        this.$watch('model', () => {
          this.model && this.form.setFieldsValue(pick(this.model, fields))
        })
      }
    }
    </script>